She's single-handedly provided us with so many warm and fuzzies by offering up the spine-tingling preview (below) of her stirring performance of Silent Night featuring Trisha Yearwood and Reba McEntire!

This trio of powerhouse vocalists will surely satisfy your holiday cheer factor, and may even cause tears to well up in your eyes like melting icicles!

After inviting The 4Troops, a singing group of Iraq and Afghanistan veterans, to join Jessica Simpson onstage during the taping of her PBS Christmas special in NYC on Thursday, the vets were uninvited because of their wardrobe.

They needed to be in their finest of silks and it seems that their camos wouldn't do it!

A source claims:

"Jessica's dad, Joe Simpson, effectively kicked them off the show because he didn't like what they were wearing. They were in camo pants and blazers, the same outfits they wore to sing for Gen. David Petraeus on the USS Intrepid. They were told they couldn't perform unless they were wearing tuxedos.

They waited for six hours until midnight only to be told their number with Jessica had been cut from the show. The irony was Jessica was on stage saying how much she supports and admires the troops, and the veterans were stuck in a room in the basement. Instead of enduring more humiliation, the veterans left."

And the group is pissed!

A spokeswoman for 4Troops said, "Joe should be ashamed of himself."

Jessica is denying that cutting the song was a personal issue, but they never did receive an apology!

The singer's rep said:

"The song was cut due to time. Jessica wasn't even aware. She is wholeheartedly devoted to the troops. She just returned from the Persian Gulf where she performed for and met with service men and women stationed at several different locations. The military was the source of inspiration for her entire Christmas album, so much so that she recorded a duet for the album with a USS Harry Truman sailor."

Riiiiiight. Tell that to Sgt. Daniel Jens!

Jens divulged, "I am so disappointed and angry, I threw up when I got back to my room."